Yello Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1, 2015, at a cost of $250, 184. Over its 6-year useful life, the bus is expected to be driven 1, 71, 900 miles, Salvage value is expected to be $7, 210 Compute the depreciable cost per unit. Prepare a depreciation schedule assuming actual mileage was: 2015, 45, 400: 2016, 49, 500: 42,000: and 2018, 35,000